Am Sonntag, 17. November 2013, 19:06:17 schrieb Ken Moffat:
>  (Bringing this here from support after finding the fix.)
> 
>  Early last month I discovered that a user could not umount anything
> mounted via the 'user' option in fstab.  OK, I expect many people
> don't do that - it's typically for mounting external devices on a
> desktop, and I guess that desktop environments use a raft of other
> packages to let the user sitting at the machine do that.  Anyway,
> I've now found the fix:
> 
> http://marc.info/?l=util-linux-ng&m=137945227914961&w=2
> which is in util-linux-2.24.  I'm unsure if 2.23.1 was affected, I
> don't have any systems using that.
> 
>  Investigation of my six LFS-7.4-or-newer x86_64 systems showed that
> all of them needed this fix (to be clear, I upgraded to 2.24).  My
> one i686 system does NOT need this, so the problem might be specific
> to x86_64.

Hmmm, here is what i get on a VIA-C3:

lfs@io:~$ mount /mnt/pub
lfs@io:~$ umount /mnt/pub
umount.nfs: You are not permitted to unmount /mnt/pub
lfs@io:~$ uname -a
Linux io 3.11.6-LFS #1 SMP PREEMPT Mon Nov 4 03:30:14 CET 2013 i686 GNU/Linux
lfs@io:~$ cat /etc/lfs-release 
SVN-20131021
lfs@io:~$ dir /sources/util*
-rw-r--r-- 1 lfs users 3531936  2. Nov 13:40 /sources/util-linux-2.24.tar.xz

The issue still seems to come up, even with utillinux-2.24 and on i686. Btw, 
the /mnt/pub is defined in the /etc/fstab as

himalia:/data/pub   /mnt/pub  nfs  _netdev,noauto,users,exec,defaults 0 0

I've really no deep knowledge about the whole mount stuff but could it also be 
an issue in the nfs-utils package as this provides the umount.nfs tool? 

Which file system types did you check ?

> 
>  Is this worth adding to the errata for 7.4 ?
> 
>  Also, on 5 of the 6 machines (desktops, running 3.11 or later
> kernels) the last/last test in 2.24 fails when running the tests as
> a user on a completed system before installing the newer version.  It
> was ok on my server which is using a 3.10 kernel.  That's just an
> unrelated data point.
> 
> ĸen

--
Thomas
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